CN215719174U - Novel oil sprayer - Google Patents
Novel oil sprayer Download PDFInfo
- Publication number
- CN215719174U CN215719174U CN202122347364.5U CN202122347364U CN215719174U CN 215719174 U CN215719174 U CN 215719174U CN 202122347364 U CN202122347364 U CN 202122347364U CN 215719174 U CN215719174 U CN 215719174U
- Authority
- CN
- China
- Prior art keywords
- oil
- cavity
- push rod
- flow passage
- storage chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses a novel oil injector which comprises an oil injector body, a control valve component and a nozzle body, wherein the nozzle body is arranged on the oil injector body through a sleeve, a push rod cavity for accommodating a push rod is arranged in the oil injector body, a piston cavity is arranged at the top end of the push rod cavity, and a valve cavity for installing the control valve component is arranged at the top end of the piston cavity. The pressure-boosting oil drainage mechanism is simple, novel and compact in structure, high-pressure fuel oil is led into the oil storage chamber through the oil outlet flow channel in the spherical pressurization cavity, the second spring pushes the movable plug to block the oil drainage hole when large oil pressure does not exist, the oil storage chamber is equivalent to a closed space when the pressure of the fuel oil is smaller than the elastic force of the second spring, and after the high-pressure fuel oil is filled, the pressure can be instantly and completely acted on the conical transition surface of the needle valve, so that the needle valve can be quickly lifted up, the response speed is high, and the lifting time of the needle valve is shortened.
Description
Technical Field
The utility model relates to the technical field of oil injectors, in particular to a novel oil injector.
Background
In the production and manufacturing industry of diesel engine parts, an oil sprayer is a common simple part and can well control oil quantity and oil spraying action, the oil sprayer is a precision device with very high processing precision, the dynamic flow range is required to be large, the anti-blocking and anti-pollution capacity is strong, the atomization performance is good, and the oil sprayer receives oil spraying pulse signals sent by an ECU (electronic control Unit) and accurately controls the fuel oil spraying quantity.
In the traditional oil injector (shown in figure 1), a flow channel and a spherical pressurizing chamber are arranged in a nozzle body, a cavity 25 is reserved between the nozzle body and an oil injector body, the cavity 25 is communicated with a push rod cavity of the oil injector body, when in work, high-pressure fuel oil firstly enters the cavity 25, then enters the spherical pressurizing chamber through the flow passage, in the process, along with the increase of the fuel pressure, the oil returning from the gap of the push rod cavity is increased, the needle valve can be lifted by applying larger pressure to the fuel injection pump (when the needle valve is lifted initially, the pressure is concentrated), the load of the fuel injection pump is increased, the response speed of lifting the needle valve is influenced, and on the other hand, the existing spring generates certain rotating force in the processes of compression and extension, the rotating force can drive the needle valve to rotate slightly, and the head of the needle valve can be abraded in the long-term operation of the fuel injector.
Therefore, it is necessary to invent a new type of fuel injector to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel oil injector which is simple in structure, high in needle valve lifting response speed and long in service life.
In order to achieve the purpose, the utility model provides the following technical scheme: a novel oil injector comprises an oil injector body, a control valve assembly and a nozzle body, wherein the nozzle body is arranged on the oil injector body through a sleeve, a push rod cavity for accommodating a push rod is arranged in the oil injector body, a piston cavity is arranged at the top end of the push rod cavity, a valve cavity for installing the control valve assembly is arranged at the top end of the piston cavity, the control valve assembly comprises a shell, an adjusting rod and a first spring, the shell is arranged on the valve cavity in a threaded mode, the adjusting rod is connected to the middle of the shell in a threaded mode, the bottom end of the adjusting rod is rotatably connected with a rotating disc, the first spring is vertically fixed at the bottom end of the rotating disc, the other end of the first spring is fixedly connected with a piston, a U-shaped groove is milled in the surface of the piston cavity, a limiting sheet is arranged on the surface of the push rod, and the limiting sheet moves along the U-shaped groove;
an oil inlet pipe and an oil return pipe are arranged in the oil injector body, the bottom end of the oil inlet pipe protrudes out of the oil injector body, the oil return pipe is communicated with the piston cavity, a pressure-promoting oil drainage mechanism is further arranged in the oil injector body, the pressure-promoting oil drainage mechanism comprises an oil storage chamber, a second spring, a movable plug and an oil drainage hole, the oil storage chamber is formed in the surface of the bottom end of the oil injector body and is arranged on one side of the push rod cavity, the oil storage chamber is provided with a tubular extension part on the end face of the oil injector body, one end of the second spring is fixed in the oil storage chamber, the other end of the second spring is fixed with the movable plug, the movable plug slides along the inner wall of the oil storage chamber, and the oil drainage hole is horizontally arranged between the oil storage chamber and the push rod cavity;
the nozzle body includes disk seat and needle valve, inside oil feed runner, the runner of producing oil and the needle valve chamber of having seted up of disk seat, the needle valve chamber is including the upper portion activity chamber, spherical pressurized chamber and the lower part activity chamber that communicate each other, the needle valve includes upper portion movable rod and lower part movable rod, and the diameter of upper portion movable rod is greater than the diameter of lower part movable rod, and the junction forms the toper transition surface, and the toper transition surface is installed inside spherical pressurized chamber, and the oil feed runner is linked together with spherical pressurized chamber respectively with the runner of producing oil, disk seat top end terminal surface both sides are seted up flutedly respectively, and the end of oil feed runner and the runner of producing oil is linked together with the recess respectively, advance oil pipe bottom gomphosis and set up in the recess on oil feed runner top, the tubulose extension gomphosis of oil storage room bottom sets up in the recess on the runner top of producing oil.
Preferably, the upper movable rod of the needle valve is arranged at the bottom end of the push rod, and the upper movable rod can move in the cavity of the push rod.
Preferably, the oil drainage hole is arranged on the upper side of the upper movable rod and close to an oil port of the push rod cavity.
Preferably, the oil port of the oil drainage hole, which is close to the oil storage chamber, is opened beside the movable plug and can be blocked by the movable plug.
Preferably, the pipe diameter of the oil inlet flow passage is larger than that of the oil outlet flow passage.
Preferably, the push rod is integrally formed with the piston.
Preferably, an annular sealing ring is arranged inside the groove.
The utility model has the technical effects and advantages that:
1. the high-pressure fuel oil pressure-boosting oil drainage device is simple, novel and compact in structure, high-pressure fuel oil is led into the oil storage chamber through the oil outlet flow channel in the spherical pressurization cavity by the aid of the pressure-boosting oil drainage mechanism, the second spring pushes the movable plug to block the oil drainage hole when large oil pressure does not exist, the oil storage chamber is equivalent to a closed space when the pressure of the fuel oil is smaller than the elastic force of the second spring, and after the high-pressure fuel oil is filled, the pressure can be instantly and completely acted on the conical transition surface of the needle valve, so that the needle valve can be quickly lifted upwards, response speed is high, and the lifting time of the needle valve is shortened;
after the movable rod on the upper part of the needle valve is lifted, the oil drain hole can be blocked, the pressure of high-pressure fuel oil continues to rise at the moment, a part of fuel oil is atomized and sprayed at high speed, the other part of the fuel oil pushes the movable plug to move upwards to fully store the oil storage chamber, after the oil injection pump stops working, the needle valve is seated, the oil drain hole is opened, the fuel oil in the oil storage chamber is pushed by the movable plug to be sprayed into the push rod cavity through the oil drain hole, the fuel oil which absorbs heat in the push rod cavity is extruded out of the oil return pipe, and the fuel oil which newly enters the push rod cavity absorbs heat to cool the oil injector body again;
2. through setting up rotary disk and U-shaped groove, the rotary disk can rotate along with first spring, and then eliminates the revolving force of first spring, and the push rod can not take place rotatoryly along the motion of U-shaped groove to reduce the wearing and tearing of needle valve head, improve the life of sprayer.
Drawings
Fig. 1 is a schematic structural diagram of a conventional fuel injector.
Fig. 2 is a schematic view of the overall structure of the present invention.
FIG. 3 is an enlarged view of portion A of FIG. 1 according to the present invention.
FIG. 4 is an enlarged view of portion B of FIG. 1 according to the present invention.
FIG. 5 is an enlarged view of the portion C of FIG. 1 according to the present invention.
In the figure: the oil injection device comprises an oil injector body 1, a sleeve 2, a push rod cavity 3, a piston cavity 4, a shell 5, an adjusting rod 6, a first spring 7, a rotating disk 8, a U-shaped groove 9, a limiting piece 10, an oil inlet pipe 11, an oil return pipe 12, an oil storage chamber 13, a second spring 14, a movable plug 15, an oil drainage hole 16, a tubular extension part 17, a valve seat 18, a needle valve 19, an oil inlet flow passage 20, an oil outlet flow passage 21, a spherical pressurizing chamber 22, a conical transition surface 23 and a groove 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a novel oil injector shown in figures 2-5, which comprises an oil injector body 1, a control valve assembly and a nozzle body, wherein the nozzle body is arranged on the oil injector body 1 through a sleeve 2, a push rod cavity 3 for accommodating a push rod is arranged in the oil injector body 1, the top end of the push rod cavity 3 is provided with a piston cavity 4, the top end of the piston cavity 4 is provided with a valve cavity for installing the control valve assembly, the control valve assembly comprises a shell 5, an adjusting rod 6 and a first spring 7, the shell 5 is arranged on the valve cavity in a threaded manner, the adjusting rod 6 is connected to the middle part of the shell 5 in a threaded manner, the bottom end of the adjusting rod 6 is rotatably connected with a rotating disk 8, the first spring 7 is vertically fixed at the bottom end of the rotating disk 8, the other end of the first spring 7 is fixedly connected with a piston, the surface of the piston cavity 4 is milled with a U-shaped groove 9, the surface of the push rod is provided with a limiting sheet 10, the limiting sheet 10 moves along the U-shaped groove 9, because the first spring 7 can generate certain rotating force in the compression and extension processes, the rotating force is applied to the push rod, so that the push rod can also generate certain rotation, and because the needle valve 19 is fixed at the bottom end of the push rod, the needle valve 19 can also rotate slightly, and the head of the needle valve 19 can be worn in the long-term operation of the fuel injector, so that the rotating disk 8 can rotate along with the first spring 7 by arranging the rotating disk 8 and the U-shaped groove 9, the rotating force is eliminated, the push rod moves along the U-shaped groove 9, the rotation cannot occur, the wear of the head of the needle valve 19 is reduced, and the service life of the fuel injector is prolonged;
an oil inlet pipe 11 and an oil return pipe 12 are arranged in the oil injector body 1, the bottom end of the oil inlet pipe 11 protrudes out of the oil injector body 1, the oil return pipe 12 is communicated with the piston cavity 4, a pressure-promoting oil drainage mechanism is also arranged in the oil injector body 1, the pressure-promoting oil drainage mechanism comprises an oil storage chamber 13, a second spring 14, a movable plug 15 and an oil drainage hole 16, the oil storage chamber 13 is arranged on the bottom end surface of the oil injector body 1 and is arranged on one side of the push rod cavity 3, the oil storage chamber 13 is provided with a tubular extension part 17 on the end surface of the oil injector body 1, one end of the second spring 14 is fixed in the oil storage chamber 13, the other end of the second spring is fixed with the movable plug 15, the movable plug 15 slides along the inner wall of the oil storage chamber 13, and the oil drainage hole 16 is horizontally arranged between the oil storage chamber 13 and the push rod cavity 3;
the nozzle body comprises a valve seat 18 and a needle valve 19, an oil inlet flow passage 20, an oil outlet flow passage 21 and a needle valve 19 cavity are formed in the valve seat 18, the needle valve 19 cavity comprises an upper movable cavity, a spherical pressurizing chamber 22 and a lower movable cavity which are communicated with each other, the needle valve 19 includes an upper movable rod and a lower movable rod, the diameter of the upper movable rod is larger than that of the lower movable rod, and the connection part forms a conical transition surface 23, the conical transition surface 23 is arranged inside the spherical pressurizing chamber 22, the oil inlet flow passage 20 and the oil outlet flow passage 21 are respectively communicated with the spherical pressurizing chamber 22, in order to facilitate production and installation, two sides of the end surface of the top end of the valve seat 18 are respectively provided with a groove 24, the end parts of the oil inlet flow passage 20 and the oil outlet flow passage 21 are respectively communicated with the grooves 24, the bottom end of the oil inlet pipe 11 is embedded in the groove 24 at the top end of the oil inlet flow passage 20, and the tubular extension part 17 at the bottom end of the oil storage chamber 13 is embedded in the groove 24 at the top end of the oil outlet flow passage 21.
Specifically, the upper movable rod of the needle valve 19 is mounted at the bottom end of the push rod, the upper movable rod can move in the push rod cavity 3, an oil port of the oil drain hole 16, which is close to the push rod cavity 3, is formed in the upper side of the upper movable rod, because the movement distance of the needle valve 19 is small, in order to ensure that oil does not leak from the oil drain hole 16, the oil drain hole 16 can be arranged to be flat, the oil port of the oil drain hole 16, which is close to the oil storage chamber 13, is formed beside the movable plug 15 and can be blocked by the movable plug 15, and the pipe diameter of the oil inlet flow passage 20 is larger than that of the oil outlet flow passage 21;
further, in the above technical scheme, in order to facilitate production and processing and improve strength, the push rod and the piston are integrally formed;
further, in the above technical solution, in order to improve the sealing performance between the nozzle body and the injector body 1, an annular seal ring is provided inside the groove 24.
This practical theory of operation:
the fuel injector is installed in the equipment, high-pressure fuel is introduced through the fuel inlet pipe 11 by the fuel injection pump, the high-pressure fuel is introduced into the spherical pressurizing chamber 22 of the valve seat 18 and acts on the conical transition surface 23 of the needle valve 19, the pressure of the fuel is gradually increased until the pressure of the first spring 7 is overcome, the needle valve 19 is lifted from the valve seat 18, the high-pressure fuel is atomized and injected into the engine at high speed, after the fuel is delivered by the fuel injection pump, the pressure acting on the conical transition surface 23 is reduced, the first spring 7 pushes the needle valve 19 to be seated, and the fuel supply of the engine is cut off;
by arranging the pressure-boosting oil drainage mechanism, high-pressure fuel oil is introduced into the oil storage chamber 13 through the oil outlet flow passage 21 in the spherical pressurizing cavity, when large oil pressure does not exist, the second spring 14 pushes the movable plug 15 to block the oil drainage hole 16, when the pressure of the fuel oil is smaller than the elastic force of the second spring 14, the oil storage chamber 13 is equivalent to a closed space, after the high-pressure fuel oil is filled, the pressure can be instantly and completely acted on the conical transition surface 23 of the needle valve 19, so that the needle valve 19 can be quickly lifted upwards, the response speed is high, after a movable rod on the upper part of the needle valve 19 is lifted, the oil drainage hole 16 can be blocked, at the moment, the pressure of the high-pressure fuel oil is continuously lifted, one part of the fuel oil is atomized and sprayed at a high speed, the other part of the fuel oil pushes the movable plug 15 to move upwards to fully store the oil storage chamber 13, after the oil injection pump stops working, the needle valve 19 is seated, the oil drainage hole 16 is opened, the fuel oil in the oil drainage chamber 13 is pushed by the movable plug 15, the fuel oil is sprayed into the push rod cavity 3 through the oil drainage hole 16, the fuel oil which absorbs heat in the push rod cavity 3 is extruded out from the oil return pipe 12, and the fuel oil which newly enters the push rod cavity 3 absorbs heat again to cool the oil injector body 1, so that the cooling effect is improved, and the lifting time of the needle valve 19 can be shortened.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (7)
1. The utility model provides a novel fuel injector, includes the fuel injector body (1), control valve subassembly and nozzle body, and the nozzle body is installed on fuel injector body (1) through sleeve (2), have push rod chamber (3) that hold the push rod in fuel injector body (1), push rod chamber (3) top is provided with piston chamber (4), and piston chamber (4) top is provided with the valve pocket that is used for installing control valve subassembly, its characterized in that: the control valve assembly comprises a shell (5), an adjusting rod (6) and a first spring (7), the shell (5) is installed on a valve cavity in a threaded mode, the adjusting rod (6) is connected to the middle of the shell (5) in a threaded mode, the bottom end of the adjusting rod (6) is connected with a rotating disk (8) in a rotating mode, the first spring (7) is vertically fixed to the bottom end of the rotating disk (8), the other end of the first spring (7) is fixedly connected with a piston, a U-shaped groove (9) is milled in the surface of a piston cavity (4), a limiting piece (10) is arranged on the surface of a push rod, and the limiting piece (10) moves along the U-shaped groove (9);
an oil inlet pipe (11) and an oil return pipe (12) are arranged in the oil injector body (1), the bottom end of the oil inlet pipe (11) is arranged to protrude out of the oil injector body (1), the oil return pipe (12) is communicated with the piston cavity (4), the oil injector is characterized in that a pressure-promoting oil drainage mechanism is further arranged in the oil injector body (1), the pressure-promoting oil drainage mechanism comprises an oil storage chamber (13), a second spring (14), a movable plug (15) and an oil drainage hole (16), the oil storage chamber (13) is arranged on the surface of the bottom end of the oil injector body (1), and is arranged at one side of the push rod cavity (3), the oil storage chamber (13) is provided with a tubular extension part (17) at the end surface of the oil injector body (1), one end of the second spring (14) is fixed in the oil storage chamber (13), the other end is fixed with a movable plug (15), the movable plug (15) slides along the inner wall of the oil storage chamber (13), the oil drain hole (16) is horizontally arranged between the oil storage chamber (13) and the push rod cavity (3);
the nozzle body comprises a valve seat (18) and a needle valve (19), wherein an oil inlet flow passage (20), an oil outlet flow passage (21) and a needle valve (19) cavity are formed in the valve seat (18), the needle valve (19) cavity comprises an upper movable cavity, a spherical pressurizing chamber (22) and a lower movable cavity which are communicated with each other, the needle valve (19) comprises an upper movable rod and a lower movable rod, the diameter of the upper movable rod is larger than that of the lower movable rod, a conical transition surface (23) is formed at the joint of the upper movable rod and the lower movable rod, the conical transition surface (23) is installed in the spherical pressurizing chamber (22), the oil inlet flow passage (20) and the oil outlet flow passage (21) are communicated with the spherical pressurizing chamber (22) respectively, grooves (24) are formed in two sides of the top end face of the valve seat (18) respectively, the end portions of the oil inlet flow passage (20) and the oil outlet flow passage (21) are communicated with the grooves (24) respectively, and the bottom of the oil inlet pipe (11) is embedded in the grooves (24) arranged on the top ends of the oil inlet flow passage (20), the tubular extension part (17) at the bottom end of the oil storage chamber (13) is embedded in the groove (24) at the top end of the oil outlet flow passage (21).
2. The new fuel injector as set forth in claim 1, characterized in that: the upper movable rod of the needle valve (19) is arranged at the bottom end of the push rod, and the upper movable rod can move in the push rod cavity (3).
3. The new fuel injector as set forth in claim 1, characterized in that: an oil port of the oil drainage hole (16) close to the push rod cavity (3) is formed in the upper side of the upper movable rod.
4. The new fuel injector as set forth in claim 1, characterized in that: an oil port of the oil drainage hole (16) close to the oil storage chamber (13) is opened beside the movable plug (15) and can be blocked by the movable plug (15).
5. The new fuel injector as set forth in claim 1, characterized in that: the pipe diameter of the oil inlet flow passage (20) is larger than that of the oil outlet flow passage (21).
6. The new fuel injector as set forth in claim 1, characterized in that: the push rod and the piston are integrally formed.
7. The new fuel injector as set forth in claim 1, characterized in that: an annular sealing ring is arranged in the groove (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122347364.5U CN215719174U (en) | 2021-09-27 | 2021-09-27 | Novel oil sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122347364.5U CN215719174U (en) | 2021-09-27 | 2021-09-27 | Novel oil sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215719174U true CN215719174U (en) | 2022-02-01 |
Family
ID=80025533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122347364.5U Active CN215719174U (en) | 2021-09-27 | 2021-09-27 | Novel oil sprayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215719174U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898510A (en) * | 2021-09-27 | 2022-01-07 | 常州市富奥机械有限公司 | Novel oil sprayer |
-
2021
- 2021-09-27 CN CN202122347364.5U patent/CN215719174U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898510A (en) * | 2021-09-27 | 2022-01-07 | 常州市富奥机械有限公司 | Novel oil sprayer |
| CN113898510B (en) * | 2021-09-27 | 2024-07-23 | 常州市富奥进出口有限公司 | Novel fuel injector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104018966B (en) | Pressure accumulation current-limiting type electromagnetic control oil sprayer | |
| CN107503870B (en) | Fuel supply system for diesel engine | |
| CN204200442U (en) | A kind of mesopore pressure accumulation is without static leakage oil sprayer | |
| CN215719174U (en) | Novel oil sprayer | |
| CN105673282B (en) | Pressure balance valve type common-rail injector | |
| CN103104391B (en) | With the electric control oil injector of diesel engine of control valve | |
| CN203175733U (en) | Control jet flat valve structure of electronic control fuel injector | |
| CN102287270B (en) | Constant high pressure injection system for diesel fuel | |
| CN113898510A (en) | Novel oil sprayer | |
| CN111577498B (en) | Common rail oil injector based on two-position three-way principle | |
| CN202148954U (en) | Fuel oil high-pressure constant-pressure injection system of diesel engine | |
| CN105351115B (en) | No leakage voltage control standard fuel gas ejecting device | |
| CN109139319B (en) | Common rail fuel injector | |
| CN112523909B (en) | Isobaric injection pump of high-speed machine | |
| CN109869251A (en) | A kind of coupling fluid-structure fuel injector | |
| CN109162848B (en) | Electric control oil injector system | |
| CN208816259U (en) | A kind of common-rail injector | |
| CN208966463U (en) | Diesel electric-controlled monoblock pump fuel oil circulator | |
| CN203098111U (en) | Control injection valve of electronic fuel injector | |
| CN208010497U (en) | A kind of fuel oil injector reducing metering servovalve deformation | |
| CN221568686U (en) | Oil sprayer without oil return | |
| CN112459943B (en) | Piezoelectric type common rail oil injector with oil nozzle switch controlled by lever-piston | |
| CN205207028U (en) | Bivalve electronic control fuel injection system for heavy oil open in usual | |
| CN217815197U (en) | Controller seal structure | |
| CN215719173U (en) | Needle valve rotation-proof oil sprayer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |